Gaya APA
Cho, Y., Lee, Y. (2017).
Why? : Daily Life Savety = Keselamatan Sehari-Hari .
Jakarta:
PT. Elex Media Komputindo.
Gaya MLA
Cho, Yeongseon., Lee, Yeongho.
"Why? : Daily Life Savety = Keselamatan Sehari-Hari".
Jakarta:
PT. Elex Media Komputindo,
2017.
Text.